Spark arrester



G. CARPENTER SPARK ARRESTER May 10, 1932.

Filed July 28, 1929 3 Sheets-Sheet l ATTORNEYS G. CARPENTER SPARK ARRESTER May 10, 1932.

Filed July 26, 1929 3 Sheets-Sheet 2 INVENTOR 65m V Qo- ATTORNEYS May 10, 1932. G. CARPENTER 1,857,353

SPARK ARRESTER .-Filed Jul 'zs, 1929 5 Sheets-Sheet 5 FIG. 7' FIG.5

INVENTOR (PM VQrg ATTORNEYS Patented May 10, 1932 GUY CARPENTER, OF NEW YORK, 'N. Y.;

SPARK Annns'rnn Application filed July 26,

My invention relates to that class of devices designed to prevent the escape of sparks, cinders, and the like, from the stack of a locomotive; and has for its obj ect,to provide a device which will impart a helical motion to the products of-combustion, whereby the cinders and other combustible materials in suspension are broken up into fine parti cles which, when they are small enough tobe f safe, are diverted by direction'vanes soas to be passed through a screen. They will then be too small to carry sufiicient fireto ignite any combustibles adjacent the railroad right of way.

My means for accomplishing the foregoing object may be more readily understoodby reference to the accompanying drawings, in which. p j n ,Fig; 1 is. a vertical sectional view through the smoke box of a locomotive:

Fig. 2 is a detail view of the direction vanes; I Fig. 3 is a view of the annular vanes for imparting a whirling motion to the products of combustion;

Fig. 4 is a vertical section through the front end of a locomotive, showing my improved mechanism installed in the smoke box;

Figs. 5 and 6 are detail views of the direc- I tion vanes;

Figs. 7, 8 and 9 are detail views of the annular vanes; and

Fig. 10 is a cross section of one of the an nular vanes. Similar reference numerals re fer to similar parts throughout the entire description.

As shown in the drawings, I provide a cylindrical intake chamber connecting the front end of a locomotive.

space around the base of the stack 1 with the Only a fragmentary portion of the boiler tubes 3 is shown, as obviously the boiler of the locomotive forms no part of my invention. A smoke chamber 4 y is formed in the smoke box 5, by partitions 6,

7 and 8. The lower partition 7 has an opening through which extends an exhaust nozzle 9 below the stack 1. The front wall, partition 8 has an opening to which is fitted a cylinder 10, the front end of which is covered by a screen 11. The opening for the screen duced by-the high velocities,

particles to-the screen 11,"where.the action 1929; snn No. 381,202

11, however, is not concentric With the opening in the wall 8, but is concentric with the boiler shell 12 of the locomotive, so as to pro-v vider an annular space between the'cylinder. 10 and the'boiler shellilQ. In this annular space I mount a; series of diagonally-inclined vanes 18, clearly seen inthe detail Views, Figs. 7 -to 10. Onthe front endlt of. thelocomotive I mount'a series of vanes15.v 4 e 1 I The toperation of the invention is as fol lows: e The exhaustpassing througlT the nozzle 9 creates a'partial vacuum inthe front 'endof r high velocity is utilized to divert the products curved ,direotion of combustion and cause them to travel cir- I cumferentially around the shell 12 :of" the boiler, 'bymeans of the diagonally-inclined vanes 13loc'atedjin the annular spacejintermediate the cylinder 10 and'the boiler shell 12. Due to centrifugal forces whichare pro- 7 a rotary orheli-V cal motioneof the gases-is setup, ,and'the cinders and-sparks which are inzsuspension in the products of combustion are very effectually ground up'and reduced toa size wherethey become harmless. t The' centrifugal force, however, tends "to retain the-cinder's, etc., in the front end of thelocomotive, and I overcomethis by means of the direction blades 15. These blades 15 tend'to convert the movement of the solid particles, from a circular pathein, a plane normal to theaxisof the boiler, to a path, oripaths, still circular, but inclined to the axis of the boiler, thereby returning the of the flow of the gases will carry the particles through the screen 11, when theyare pulverized small enough to pass through, thus effectively removing any'danger of fire from escapingcinders. In other words, when the gases andcinders reach the forward end of the smoke box, there'is a reversal inflow of the gases, and the cinders, which would otherwise be held by centrifugal force in a whirling-mass at the peripheryofthe smoke I 9 t-it'i'ons'which form a chamber which encloses box, are caught by the direction vanes or blades 15, and together with the gases, are

given a vortical motion by these blades, in a rearward direction. The blades 15 are ad- 'jacent the point of highest draft, and therefore the cinders and gases flowing from them V to the stack travel in a diminishing spiral or vortex'towards the-point of discharge.

fore reserve to myself such changes as may regard as new,"and desire to secure by Let fall within the scope of the hereinafter appended-claims. I

f Having described my invention, what I ters Patent of the United States, is

A LYThe combinatiomwith a locomotive having boiler tubes 7 and a shell, of a; smoke box at the forward end of. said boilerjtu'bes, a stack which leads irom said smoke box, partitions which form a chamber which encloses the lower-end of said stack, an exhaust nozzle which leads into said chamber below said stack, anexhaust port in the front wall of said chamber, a cylindrical member connected to the front wallof sa'id chamber,

. which surroundssaid port, there being an 46 annular space between the outer wall of said-cylindrical member and the shell of'the boiler, ;a plurality of diagonally-inclined vanes located in said annular space, a series of curved direction blades attached to the front end of the smoke box, and a screen covering the openin-g to the cylindrical member.

- 2. The combination, with a locomotive hav ing boiler tubes and a shell,of a smokebox Y ie at the forward endof "said boiler'tubesya stackwhich leads from said smoke box, parthe lower end of saidstack, an exhaust nozzlewhich leads into said chamber below said stack, an exhaustport in the front wall of said chamber, a cylindricalmember, c0n'- nected to the front wall of said chamber,

which eccentrically' surrounds said port," there being an annular space-between the outer wall of said cylindrical member and the shell of the boiler, a plurality of diagonally-in- 'clinedvanes locatedin said annular space,-a

series of curved direction blades attached to the front end of the'smoke' box, and a 'nular, space between ing boiler tubes and a shell, of a smoke box at the forward end of'said boiler tubes, a stack which leads from said smoke box, partitions which form a chamber which encloses the lower end of said stack, an exhaust nozzle which leads into said chamber below said stack, an exhaust port in the front wall of said chamber, a cylindrical member connected to the front wall of said chamber, said cylindrical member being mounted concennae-mum shellof the boiler, there being an annular space between the outer wall of said cylindrical member and the shell of the boiler, 'a plurality of diagonally-inclined vanes located in said annular space, a series of curved direction 'bladesattached to the front end of the smoke box, anda screen covering the opening to -the=c-ylindrical member. 7

4. The combination, jwith a locomotive having boiler tubes and a shell, of a smoke box at the "forwardend o-fsaid boiler tubes, stack which leads from said smokeibox, partitions which form a" chamber which encloses thelowerendof said stack, anexha ust nozzle which leads into said chamber below said stack, an exhaust port in the front wall of said chamber, acylindricalmember con nectedto the front wall of said'cha'mb'er, which surrounds sald member, said member being-eccentric to the said port butconcen'tric to the shell of the boiler, there being an an the outer wall of said cylindrical member and the shell of the boiler, means located in said annular "spacedirecting the products of combustion into a circular path, means attachedto the front end of the smoke box to divert said'products of combustion into the cylindrical member,

and a screen covering the opening to the cylindricalmemben.

- GUY CARPENTER.

screen covering the openingto the cylindrical' member. I s

v 8. The combinatiomwitha locomotive havx- 

